Using version 1.8.1 with OS 10.5.1, Spider Palace Easy beginning stage, the secret space located in the rooms accessed through the lower right gateway is not recorded, the similar secret area located in the rooms accessed through the lower left gateway is record as a secret found. So I'm not able to have recorded that I found 100% of the secrets. Thanks for a great game that I still enjoy playing after many years.

I believe that the secret in 16901 in the bottom right section isn't meant to be a secret. The lower left section does have a secret recorder, aka a blue S.

I checked the numbers of secrets and it appears to be all good. So, there's still one more secret out there that isn't this.  :P

You can check the high scores (http://www.actionsoft.com/mm/newscores/scores.php?m=8) to eliminate your doubts that 100% secrets isn't possible. ::)

The secret, not recorded, is located in room 006825 that is a similar space as the secret on the lower left section.